What two numbers multiply to -400 and add up to -198?

Here we answer the question: "What two numbers multiply to -400 and add up to -198?"

The answer to your question is:

-200 and 2

Below we illustrate and prove that -200 and 2 multiply to -400 and add up to -198:

-200 × 2 = -400
-200 + 2 = -198

Are you asking because you are trying to figure out how to factor the following quadratic equation?

x² - 198x - 400 = 0

If so, the solution to factor the quadratic equation above is:

(x - 200 ) (x + 2)

To summarize, since -200 and 2 multiply to -400 and add up -198, you know that the following is true:

x² - 198x - 400 = (x - 200 ) (x + 2)

Multiply To One Number and Add Up To Another
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